Re: the race to the bottom problem

[Ca By <[e-mail]>]

On Sat, Nov 7, 2020 at 5:38 PM Brian E Carpenter <
[e-mail]> wrote:

> On 08-Nov-20 14:00, Ca By wrote:
> ...
> > History tells us that ipv4 was scarce so people conserved addresses.
> >
> > Operators have unlearend that lesson but the ietf has not.
>
> If that is true, why on Earth does 3GPP still ration each PDP context to
> one /64? That is for sure not the IETF's fault. We've told them and told
> them.
>
> It is not the case that the IETF hasn't learned the lesson. In fact, the
> lack of scarcity is exactly why "wasting" 64 bits on Interface IDs and
> handing out /48 or /56 to end users are the IETF recommendations. The
> pressure against those recommendations is *exactly* the race to the bottom.
>
> (In answer to Nick: the data for the race to the bottom don't come from
> IPv6. We're talking about IPv4, between about 1993 and today.)
>
> But Cameron, please tell us in detail why PD is problematic for some
> operators. That seems to be the sticking point here.
>

Honestly, i believe the issue is that dhcp-pd does not exist in 3gpp
deployments and there is no way to will it into place.  /64s are assigned
from the gateway using a local pool assigned the the gateway. Very simple,
no radius, no dhcp, no binding pd routing to assignments

So, just like with 64share, we need to work with what we have.

1. We have slaac, can slacc gives us more addresses ?

2.  Each attachment to 3gpp provides a /64, is there a real problem today
with scaling up attachments to get more /64 addresses on demand?  Probably
fine for 2 or 3 more /64 in the common home scenarios.

3.  Can we adapt 64share to slice up the existing /64 ?

4.  Other? Not dhcp-pd.

5.  Ndproxy ?

The problem that i have today, is that $dayjob has a very quick growing
4G/5G home broadband business.  Today, we use 64share to get ipv6 on to the
LAN. Works great. But, a lot of people are using “google wifi” mesh which
adds ... a 3rd layer of nat44 and kills ipv6 getting to the actual user
LAN. But, google wifi does support dhcpv6-pd. Might be nice if it supported
ndproxy





>    Brian
>